Influence of high melting elements on microstructure, tensile strength and creep resistance of the compositionally complex alloy Al10Co25Cr8Fe15Ni36Ti6

2021 ◽  
pp. 125163
Author(s):  
S. Haas ◽  
A.M. Manzoni ◽  
M. Holzinger ◽  
U. Glatzel
Keyword(s):  
Tensile Strength ◽  
Creep Resistance ◽  
High Melting ◽  
Complex Alloy

scholarly journals Effects of Substitution of Y with Yb and Ce on the Microstructures and Mechanical Properties of Mg88.5Zn5Y6.5

Metals ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 31
Author(s):  
Hongxin Liao ◽  
Taekyung Lee ◽  
Jiangfeng Song ◽  
Jonghyun Kim ◽  
Fusheng Pan
Keyword(s):  
Mechanical Properties ◽  
Thermal Stability ◽  
Tensile Strength ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Creep Resistance ◽  
Room Temperature ◽  
High Thermal Stability ◽  
Long Period ◽  
Microstructures And Mechanical Properties

The microstructures and mechanical properties of the Mg88.5Zn5Y6.5-XREX (RE = Yb and Ce, X = 0, 1.5, 3.0, and 4.5) (wt.%) alloys were investigated in the present study. Mg88.5Zn5Y6.5 is composed of three phases, namely, α-Mg, long-period stacking ordered (LPSO) phases, and intermetallic compounds. The content of the LPSO phases decreased with the addition of Ce and Yb, and no LPSO phases were detected in Mg88.5Zn5Y2.0Yb4.5. The alloys containing the LPSO phases possessed a stratified microstructure and exhibited excellent mechanical properties. Mg88.5Zn5Y5.0Ce1.5 exhibited the highest creep resistance and mechanical strength at both room temperature and 200 °C, owing to its suitable microstructure and high thermal stability. The yield strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature was 358 MPa. The ultimate tensile strength of Mg88.5Zn5Y5.0Ce1.5 at room temperature and 200 °C was 453 MPa and 360 MPa, respectively.

Processing of Zinc-Based MgAl2O4 Composite and Effect of Fly Ash Addition

2007 ◽  
Vol 336-338 ◽  
pp. 1203-1206 ◽  
Author(s):  
Metin Gürü ◽  
M. Korçak ◽  
Süleyman Tekeli ◽  
Ahmet Güral
Keyword(s):  
Tensile Strength ◽  
Fly Ash ◽  
Melting Point ◽  
Low Density ◽  
High Melting ◽  
Spinel Oxide ◽  
High Melting Point ◽  
Corrosion Resistant ◽  
Coal Power ◽  
Resistant Composite Material

The properties of ceramic-metal (Cermet) composites as tensile strength, hardness and resistance to corrosion and high temperature are superior than ceramics and metals. Because of the enhanced characteristics of cermets, they are commonly used in various applications and industries. The main objective of this study is to produce a cheap, easy produced, strong and high corrosion resistant composite material. For these purposes, zinc is used for its natural capacity against corrosion, low density, low melting point and softness. Magnesium aluminates spinel oxide (MgAl2O4) is chosen because of its high melting point and low density. Fly ash is a waste from coal power plant having puzzolanic properties. In this study, the effect of various amounts of zinc and fly ash addition on density and hardness behaviour of zinc-based MgAl2O4 composites was investigated. The experimental results showed that zinc and fly ash addition improved the hardness behavior of zincbased MgAl2O4 composite.

scholarly journals Tensile Strength and Creep Resistance in Nanocrystalline Cu, Pd and Ag

1990 ◽  
Vol 206 ◽  
Author(s):  
G. W. Nieman ◽  
J. R. Weertman ◽  
R. W. Siegel
Keyword(s):  
Mechanical Properties ◽  
Grain Size ◽  
Tensile Strength ◽  
Yield Strength ◽  
Creep Resistance ◽  
Room Temperature ◽  
True Strain ◽  
Constant Load ◽  
Creep Tests ◽  
Grain Sizes

ABSTRACTMeasurements of tensile strength and creep resistance have been made on bulk samples of nanocrystalline Cu, Pd and Ag consolidated from powders by cold compaction. Samples of Cu-Cu2O have also been tested. Yield strength for samples with mean grain sizes of 5–80 nm and bulk densities on the order of 95% of theoretical density are increased 2–5 times over that measured in pure, annealed samples of the same composition with micrometer grain sizes. Ductility in the nanocrystalline Cu has exceeded 6% true strain, however, nanocrystalline Pd samples were much less ductile. Constant load creep tests performed at room temperature at stresses of >100 MPa indicate logarithmic creep. The mechanical properties results are interpreted to be due to grain size-related strengthening and processing flaw-related weakening.

Microstructure and Mechanical Properties of Mg-Y Alloys

2011 ◽  
Vol 239-242 ◽  
pp. 352-355
Author(s):  
Quan An Li ◽  
Qing Zhang ◽  
Chang Qing Li ◽  
Yao Gui Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Rare Earth ◽  
Melting Point ◽  
Room Temperature ◽  
Optimum Combination ◽  
High Melting ◽  
High Melting Point ◽  
Microstructure And Mechanical Properties ◽  
The Matrix

The effects of 2-12 wt.% Y addition on the microstructure and mechanical properties of as-cast Mg-Y binary alloys have been investigated. The results show that proper content of rare earth Y addition can obviously refine the grains and form high melting point Mg24Y5 phases in the matrix, and improve the microstructure and mechanical properties of the alloys. At room temperature, the optimum combination of ultimate tensile strength and elongation, 195MPa and 7.5%, is obtained in Mg-10 wt.% Y alloy.

RMI 8Al-1Mo-1V

Alloy Digest ◽  
1982 ◽  
Vol 31 (2) ◽  
Keyword(s):  
Tensile Strength ◽  
Creep Resistance ◽  
High Strength ◽  
Heat Treating ◽  
Bend Strength ◽  
Beta Titanium Alloy ◽  
Annealed Condition ◽  
Jet Engine ◽  
Beta Titanium ◽  
Alpha Beta

Abstract RMI 8A1-1Mo-1V is an alpha-beta titanium alloy with a tensile strength of 135,000 psi in the mill-annealed condition. It has an excellent combination of tensile strength and creep resistance that makes it suitable for service to 1000 F. It is recommended for aircraft and jet-engine parts requiring high strength with superior creep resistance and toughness. This datasheet provides information on composition, physical properties, hardness, elasticity, tensile properties, and bend strength as well as creep. It also includes information on high temperature performance and corrosion resistance as well as heat treating, machining, joining, and surface treatment. Filing Code: Ti-84. Producer or source: RMI Company.

Effect of Sr and Sb on Microstructure and Mechanical Properties of Mg-5AI-2Si Alloys

2006 ◽  
Vol 321-323 ◽  
pp. 1365-1369 ◽  
Author(s):  
Dae Hyun Song ◽  
C.W. Lee ◽  
K.Y. Nam ◽  
S.W. Lee ◽  
Yong Ho Park ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Creep Resistance ◽  
Tensile Elongation ◽  
Chinese Script ◽  
Microstructure And Mechanical Properties ◽  
Polygonal Shape

A study has been made on the effects of antimony (Sb) and strontium (Sr) additions on the microstructure of Mg-Al-Si alloys. Results showed that the additions of Sb and Sr can modify the morphology of Mg2Si particles from Chinese script shape to refined polygonal shape. Tensile strength and creep resistance were improved and tensile elongation was also increased in the modified alloy with Sb and Sr. The addition of Sr was more effective than Sb modification of AS52 alloy for refining microstructure and thus improving properties.

scholarly journals Fabrication and Properties of Aluminum-Containing Silicon Carbide Fibres

2007 ◽  
Vol 16 (2) ◽  
pp. 096369350701600
Author(s):  
Yuxi Yu
Keyword(s):  
Tensile Strength ◽  
Young’S Modulus ◽  
Creep Resistance ◽  
Young's Modulus ◽  
Stoichiometric Composition ◽  
Strength Test ◽  
X Ray Diffraction ◽  
Element Analysis ◽  
X Ray ◽  
Tensile Strength Test

By introducing hetero-element aluminum into ceramic precursor and then sintering, polycrystalline, stoichiometric SiC fibres can be prepared. Two types of aluminum-containing SiC fibres were fabricated by the use of aluminum-containing polycarbosilane (Al-PCS). The air-cured Al-PCS fibres were pyrolyzed in inert gas up to 13 50 °C to obtain SiC(OAl) fibres, which were converted into SiC(Al) fibres by heating in argon up to 1800 °C. The properties and performances of SiC(OAl) and SiC(Al) fibres were studied by chemical element analysis, scanning electron microscopy (SEM), X-ray diffraction (XRD), tensile strength test, heat resistance and creep resistance. These results show SiC(Al) are polycrystalline SiC fibres, have a near stoichiometric composition. The tensile strength, Young's modulus and diameter of the SiC(OAl) fibres are 2.6 GPa, 210 GPa, 12 μm, respectively. The tensile strength, Young's modulus and diameter of the SiC(Al) fibres are 2.1 GPa, 405 GPa, 10 μm, respectively. The SiC(Al) fibres have higher thermal stability, and better creep resistance than the SiC(OAl), the Nicalon and the Hi-Nicalon fibres.

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